Sandpapering-machine.



No. 688,5", Pac ented Dec. l0, l90l. A. M. HALL & c. c. STUART.

SANDPAPERING MACHINE.

(Application filed Jan. 24, 190 1.)

(No Model.) 3 Sheets'-Sheet l.

THL NORRIS PETERS co., mo'roumm, wnsumnrom n. c.

No. 688,5". Patented Dec; l0, 19m.

A. m. HALL & c. c. STUART.

SANDPAPEBING MACHINE.

. (Application filed. Jan. 24, 1901. (No Model.) I 3 Sheets-Sheet 2.

Patented Dec. l0, mm. A. M. HALL & C. vl3. STUART.

SANDPAPERING MACHINE.

(Application filed Jan. 24, 1901.)

t 3 Sheets-Shae; 3.

(No Model.)

Wnewaea U ITED- STATES PATENT ()FFIGF.

AUGUSTUS M. HALLQAND CHARLES C. STUART, OF CAMPVILLE, CONNECTICUT.

SANDPAPERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 688,51 1, dated December 10, 1 901. Application filed January 24, 1901. Serial No. 44,493. (No model.)

To all whom it may concern.-

Be it known that we, AUGUSTUS M. HALL and CHARLES C. STUART, citizens of the United States, and residents of Campville, in the county of Litchfield and State of Connecticut,

ing-rolls together with meansfor moving all.

- of the rolls simultaneously toward and away from the reciprocating platen.

A further object is to provide a movable platen for supporting the stock to be operated upon combined with a plurality of sandpapering rolls adjustable toward and away from the movable platen and an adjusting device common to the said rolls.

A further object is to provide a structure in which the plurality of rolls are arranged in sets and to provide means for raising and lowering the several sets of rolls independent of the means for moving the entire series of rolls toward and away from the reciprocating platen. I

A further object is to provide certain new and improved features in the construction, form, and arrangement of the several parts of the machine whereby the stock to be operated upon may be brought to the required degree of smoothness in a rapid and efficient manner.

A practical embodiment of our invention is represented in the accompanying drawings, in which-' I Figure 1 represents a view in side elevation of a machine embodying our invention, the ends of the frame being broken away. Fig. 2 is a top plan view ofthe same. Fig. 3 is a transverse vertical view, partly in section, through the machine. Fig. 4 is a longitudinal vertical section through the machine. Fig. 5 represents a diagrammatic view of one of the cam-bars and two sets of sand paperingrolls, both sets being in their lowered position with respect to the bar. Fig. 6. is a similar view in which the bar has been rotated in one direction a quarter-turn to lift one set of rolls upwardlywhile the other set is still permitted to rest in its lowered position with respect to the bar. Fig. 7 is a similar view when the bar has been rotated a quarter-turn in the opposite direction from the position shown in Fig. 5, showing 'the reverse positions of the sets of rolls to that represented in Fig. 6. Fig. 8 is a similar view showing the bar turned to an intermediate position where both sets of the rolls are held at the limit of their upward movement with respect to the bar. Fig. 9 is an enlarged cross-section through the bar, taken in the plane of the line A A of Fig. 5. Fig. 10 is an enlarged crosssection through the bar, taken in the plane'of f the line B B of Fig. 5. Fig. 11 is an enlarged cross-section through the bar, taken in the plane of the line C C of Fig. 8. Fig. 12 is an enlarged cross-section through the bar, taken in the plane of the line D D of Fig. 8; and Y Fig. 13 is a detail sectional view showing the means for moving the plurality of rolls bodily toward and away from the reciprocating platen.

V The frame which we have shown for supporting the several parts of the machine consists of a pair of uprights a b, a pair of horizontal longitudinally-extended side beams c d, and a centrally-arranged longitudinally extended beam 6. J

- The table or platen for supporting the stock to be operated upon is denoted by f, and it, together with the beams c, d, and e, may be made of any desired length to suit different requirements.

A main drive-shaft g is mounted to rotate in the main frame of the machine, and it ex-' tends transversely across the same. This drive-shaft is provided with a fixed pulley h, whereby the shaft may be rotated from a source of power not shown herein.

The stock-supporting platen f is reeipro- TOC - other of the oppositely-rotating pulleys j to the shaft 70 for rotating the shaft in either of two directions. This shaft is is provided with two trains of gears for rotating a pair of pinions 0 p, which mesh with a pair of rack-bars q 1, located along the under surface of the platen f. This geared connection between the pinions and the clutch-shaft k is preferably so arranged as to reduce speed to a considerable degree to permit a slow movement of the platen. The platen f may be suitably supported and guided in the usual manner upon the central beam e and the two side beams c and d.

The sandpapering-roll-suppoi't frame 3 is herein shown as of oblong rectangular form for supporting therein aplurality of sandpapering-rolls t. The opposite ends of each of the roll-shafts are mounted in sliding boxes u o in the opposite side bars of the frame .9, which boxes are held yieldingly at the limits of their downward movements by heavy springs 10. This spring tension will permit the rolls to yield when any undue strain is brought to bear thereon that would tend to break or disarrange the same. This roll-supporting frame 8 may be adjusted toward and away from the platen f in the following manframe 5.

ing-screws 3 and 4, which are mounted in the uprights a, and Z). These screws are simultaneously rotated in either a direction to raise: the roll-supporting frame or lower the same by providing a bevel'gear connection between i the upper ends of the said screws and a crossshaft 5, mounted in the uprights a and b and;

provided with a suitable operating handwheel 6 at one side of the machine.

The means which we employ for moving one or more of the plurality of sandpaperingrolls into operative position and at the same time moving one or more of the said rolls out of position is as follows: A pair of longitudinally-extended connected cam-bars 7 and 8 are mounted in the side bars of the roll-sup v porting frame s in contact with the journal-' boxes at the opposite ends of the sandpaper-- ing-rollshafts. Theseeam-barsareconnected so that they will be rotated together in the same direction by providing short arms 9 and 10 at their front ends, the said arms being connected by a cross-bar 11 at points equal distances from the axes of the said cam-bars.

One of these armsin the present instance the arm 10is extended upwardly to form an operating-handle l2. Aseetor 13 is provided concentric with the axis of the cam-bar 8,and the handle 12 is provided with a clampingnut 14, arranged to engage the sector 13 for clamping the cam-bars in any of their rotary adjustments. As each one of the cam-bars is constructed in the same manner, we will describe one only of the said bars. The cambar is provided at the points where it engages the bearing-boxes of the several rolls with a series of depressions or flattened portions 15, 16, 17, and 18 in alinement with each other along the bar, so that when this portion of the bar is in engagement with the bearing-boxes of the several rolls all of the rolls will be at the limits of their downward movements toward the platen. At points one-quarter way around the periphery of the bar from the depressed portions above referred to, upon each side thereof, we provide flattened or depressed portions, so arranged that when the flattened portions upon one side are in engagement with the bearing-boxes of the rolls those rolls will be at the limits of their downwardmovements and the remaining rolls will be held at the limits of their upward movements away from the platen, and vice versa. In the present instance wehave shown the rolls arranged in two sets of two each and the cam-bar provided on one side of the full series of depressions with a pair of depressions l9and 20 for operating one set of the rolls and upon the other side of the full series of depressions with a pair of depressions 21 22, arranged to operate the other set of rolls. It will thus be seen that when one set of rolls is brought into operative position the other set of rolls is brought away from its operative position. When the cam-bar is turned to points intermediate the full series of depressions and the two side series of depressions, it will be'seen that the boxes, and thereby the rolls, will all be raised away from their operative positions.

The shafts of the several sandpapering-rolls are provided with driving-pulleys 23 24 25 26, which are engaged by a single belt 27. This belt passes around a fast pulley 28 on the drive-shaft g, around a fast pulley 29 on a shaft 30, mounted on the tops of the uprights a and b, and also around an idler-pulley 31, mounted on a shaft 32 in a position corresponding to the shaft g upon the otherside of the uprights a and b. The several pulleys around which this belt travels are so related to each other that the roll-supporting frame 3 may be raised and lowered without interfering with the movement of the belt. The belt is passed around the several pulleys of the rolls in such a direction as to rotate the two rolls of each set in opposite directions. To reinforce the drive of the main belt to prevent its slipping, we provide an auxiliary belt 33 at the other side of the machine, which passes around a fast pulley 34 on the drive-shaft g and around a fast pulley 35 on the shaft 30, which carries the fast pulley 29, hereinbefore described.

It will be seen that by the use of the machine hereinabove set forth it is possible to adjust all of the sandpapering-rolls toward andraway from the reciprocating platen and then bring into operation against the surface of the stock being treated one or more of the rollssuch, for instance, as those having the coarser sandpaper thereon-the operation of the rolls upon the stock not being limited to passing the stock once beneath the same, but as many times as may be desired to obtain the required smoothness. The adjusting device may then be operated-to move the roll or rolls which had been in operation out of operation and simultaneously bring into operation the roll or rolls with which it is next desired to treat the stockas, for instance,

rolls provided with a finer grain of sandpaper. It will thus be seen that the stock may be completely finished before it is necessary to again handle the same.

It is evident that changes might be resorted to in the structure, form, and arrangement of the several parts without departing from the spirit and scope of our invention. Hence we do not wish to limit ourselves strictly to the structure herein set forth; but

What we claim is- 1'. The combination with a movable platen for supporting the stock to be operated upon, of a plurality of sandpapering-rolls and means for simultaneously moving a roll into and another roll out of operative engagement with the stock, substantially as set forth.

2. The combination with a movable platen for supporting the stock to be operated upon, ofa plurality of sandpapering-rolls, means for simultaneously moving the rolls toward and away from the movable platen and means for simultaneously moving a roll into operative position and another out of operative position, substantially as set forth.

3. The combination with a suitable frame, of a platen mounted to reciprocate therein, a series of sandpapering-rolls, a supportingframe therefor, and means for moving the frame and thereby the rolls toward and away from the reciprocating platen, substantially as set forth.

4. The combination. with a movable platen for supporting the stock to be operated upon, of a series of sandpapering-rolls arranged in sets, means for simultaneously moving the rolls toward and away from the movable platen and auxiliary means for moving the sets of rolls into and out of operative position, substantially as set forth.

5. The combination with a movable platen for supporting the stock to be operated upon, of a series of sandpapering-rolls arranged in sets and means for moving the several sets into and out of operative position, substantially as set forth.

6. The combination with a movable platen,

of a series of sandpapering-rolls arranged in sets and means for simultaneously moving one set of rolls toward the platen and the other set of rolls away from the platen, substantially as set forth.

7. The combination with a movable platen, a series of sandpapering-rolls arranged in sets and a single operating means for moving one set of rolls toward the platen and the other set of rolls away from the platen and for moving all of the rolls simultaneously toward and away from the platen, substantially as set forth.

8. In combination, a plurality of sandpapering-rolls, a supporting-frame therefor,and a cam-bar common to the said rolls, for simultaneously moving a roll into and another roll out of operative position, substantially as set forth.

9. In combination, a series of sand-papering-rolls, a supporting-frame therefor and an adjusting device common to all of the rolls arranged to move the series of rolls bodily in the same direction and also to move members of the series of rolls bodily simultaneously in opposite directions.

10. In combination, a plurality of sandpapering-rolls, a supporting-frame therefor and an adjusting device common to the rolls comprising a pair of connected cam-bars, substantially as set forth.

11. Incombination,aroll-supportingframe, a plurality of sandpapering-rolls mounted in journal-boxes in the frame and an adjusting device common to the said rolls comprising a pair of connected cam-bars mounted in the frame in engagement with the said journalboxes, substantially as set forth.

12. In combinatiomaroll-supportingframe, a plurality of sets of spring-actuated journalboxes mounted to slide therein, a plurality of sandpapering rolls mounted in said boxes and an adjusting device common to the rolls comprising a pair of cam-bars mounted in the frame in engagement with the said spring actuated journal-boxes, substantially as set forth.

13. The combination with a removable platen for supporting the stock to be operated upon, of a plurality of sandpapering-rolls and a cam-bar common to the rolls for simultaneously moving a roll into and another roll out of operative position and for moving all of the rolls bodily toward and away from the platen, substantially as set forth.

14. The combination with a suitable frame, of a movable platen for supporting the work to be operated upon mounted therein,-a plu rality of sandpapering-rolls, a supportingframe therefor, an adjusting device for moving the roll supporting frame and thereby the rolls toward and away from the platen and a cam-bar carried by the roll-supporting frame for simultaneously moving a roll into and another roll out of operative position, substantially as set forth.

15. The combination with a movable platen for supporting the stock to be operated upon,- of a plurality of sandpapering-rolls, a supporting-frame therefor and a pair of connected cam-bars engaging the opposite ends of the rolls for moving them toward and away from the platen as the cam-bars are operated, sub- 7 stantially as set forth.

16. The combination with a movable platen,

of a plurality of sandpapering-rolls, a supporting-frame therefor, yielding bearings for the opposite ends of the rolls and a pair of connected cam-bars mounted in the roll-supporting frame in position to engage the yielding bearings at the opposite ends of the rolls for moving the rolls toward and away from the platen as the cam-bars are operated, substantially as set forth.

17. In combination, a suitable frame, a drive-shaft mounted therein having a drivepulley thereon, a roll-supporting frame, a plurality of sandpapering-rolls mounted therein and carrying drive-pulleys thereon, a movable platen, means for moving the roll-supporting frame toward and away from the platen, idlerpulleys carried by the frame and a single transmission-belt in engagement with the drive-shaft pulley, the idler-pulleys and the sandpapering-roll pulleys, substantially as set forth.

In testimony that we claim the foregoing as our invention we have signed our names, in presence of two witnesses, this 14th day of January, 1901.

AUGUSTUS M. HALL. CHARLES C. STUART. Witnesses:

FREDK. HAYNES, O. S. SUNDGREN. 

